2018 Niner
SIR 9 5-STAR
A 27.5″ steel frame hardtail trail bike with ultra high-end components.
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Manufacturer Price
$5,950| Frame | Steel |
|---|---|
| Suspension | Hardtail, 120mm |
| Fork | Fox Factory Float 34 |
| Wheels | 27.5″ Carbon |
| Drivetrain | 1 × 12 |
| Groupset | X01, X01 Eagle |
| Brakes | Hydraulic Disc |
| Seatpost | Dropper |
For This Bike
5'2" – 5'8"
5'6" – 5'11"
5'10" – 6'3"
6'1" – 6'7"
🐐 Estimated
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Oct 2018
I have to admit — I am somewhat of a crusty old dude and sometimes resist change until it has been thoroughly tested by others. This being the case, I was a bit doubtful when I first climbed on the Niner SIR 9, a steel hardtail that can run 27.5-plus or 29-inch wheels. The 27.5x 2.80 tires seemed like overkill compared to my super-light 29er race bike, and the thought of riding a bike that wasn’t fully suspended had me questioning my sanity.
Oct 2017 · Cass Gilbert
Like steel hardtails? We test the Niner SIR 9, boasting a modern, slack geometry, room for 27.5+ tires, and a host of bikepacking-friendly details.
Although its gear range is excellent, SRAM XO1 Eagle feels built for racing rather than bikepacking. It’s fiddly to set up and sensitive to cable stretch.
Press fit bottom bracket requires specialist tools that may be hard to find in the backcountry.
While an eccentric insert is available, none of the standard builds include it.
Jun 2017
News out of the Niner camp today. The Colorado-based bike maker has re-released its original steel classic, the SIR 9, in a redesigned, ready for anything form. - Mtbr.com
| Frame | SIR 9 - SLATE BLUE/ORANGE BB Standard: PF30, Press Fit Tire Clearance: 2.4" |
|---|---|
| Fork | FOX 34 FLOAT FACTORY FIT4, 3 POSITION W/ ADJ, KASHIMA COAT, 120MM, 110X15MM Travel: 120mm Spring Type: Air |
| Shock | N/A Spring Type: Air |
| Bottom Bracket | SRAM%20PF30 |
| Headset | NINER INTERNAL ZS SHIS DESCRIPTION ZS44/28.6|ZS56/40 |
| Stem | RACE FACE TURBINE BASIC 50MM, 35MM CLAMP |
| Handlebar | RACE FACE SIXC 820MM WIDE, 20MM RISE, 35MM CLAMP |
| Saddle | NINER CUSTOM TR WITH CRN-TI RAILS, PRINTED NINER GRAPHIC |
| Seatpost | KS LEV INTEGRA Type: Dropper |
| Pedals | N/A |
| Grips | NINER GRRRIPS L/O FLANGED |
| Rear Derailleur | SRAM Eagle X01, 12-speed |
|---|---|
| Crank | SRAM X1 EAGLE CARBON GXP 32T CNC RING |
| Shifters | SRAM X01 EAGLE 12SP |
| Cassette | SRAM EAGLE XG 1295, 10-50T |
| Chain | SRAM X01 EAGLE 12SP |
| Chain Guide | N/A |
| Brakes | SRAM GUIDE RSC Type: Hydraulic Disc |
| Brake Levers | SRAM GUIDE RSC |
| Rims | Niner Carbon XC |
|---|---|
| Spokes | 32 count front and rear |
| Front Hub | DT Swiss 350, 15mm x 110mm, 12mm x 148mm, XD Driver |
| Rear Hub | DT Swiss 350, 15mm x 110mm, 12mm x 148mm, XD Driver |
| Tires | 29" MAXXIS ARDENT DC/EXO/TR 2.4 |
Last updated April 14
Not listed for 2,197 days